Improvement in sewing-machine



' 2 SheetsSheet 1. J. GRAY.

Sewing Machine.

No. 95,581. Patented 0m. 5, I869.

Witnesses v Inventor.

2 Sheets' Sheet 2. I

1' Sewing Machine.

Patented Oct. 5, 1869.

Witnesses.

Inventor.

N. PETERS Pholo-ljlhagnphur. wnlmn wn. D. C.

fitnitrd fitattz JOS HUA"- GRAY ,'O F NEW'YORK, N. Y.

Letters Patent No. 95,581, dated 0M 5, 1869.

IMPROVEMENT IN SEWING-MACHINE.

The Schedule referredto in these Letters Patent and making part of the same.

To all whom it may concern ,Be it known that I, 'JosHUA GRAY,,0f the city, county, and State of New York, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby declare that the following is a full and exact description thereof, reference being had to theaaccompanying drawings, forming part of this specification, and to the letters of reference marked thereon.

The object of 'my invention is the production of a cheap and efficient sewing-machine; and

The nature of-n1y improvement will be hereinafter more fully described.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

Figure I represents a vertical sectional elevation, taken through the line X X, showing the cam.

Figure 11 is also a side elevation, showing the opposite side of Fig. I.

Figure III is an end elevation of the portion of the machine containing the needle-bar, and showing the arrangement of the presser-foot.

Figure 1V is an elevation of the rear end of the machine. 7

Figure V is a plan view of the feed-operating bar,

I to which is attached the vibrating looping-bar for the under thread. 7 r

Letters of like name and kind indicate like parts in each of the figures.

A represents the frame of the machine, containing my iinprow'ements.

This may he made of iron or other suitable material, but I prefer to make it of iron. 7

One end of the frame A extends upward, and is provided with a projection, B, which forms a continuous bearing for the main shaft 0, (shown in dotted lines,) upon "the outer end of which is located and secured the band-wheel I), to which the power is applied for driving the machine.

At the opposite end of the main shaft 0 is secured a double-cam wheel, E, both cams being formed upon the sides or surfaces of the wheel. The outer one is made to operate a pivoted looping-bar or lever, F, that is attached and vibrates upon a pivot-bolt, a, located in the centre of the reciprocating feed-operating bar G.

The said looping-bar F is bent, so as to form an elbow, 1, at the end next to the cam.

surface of the wheel for the purpose of operating the take-up bar I, which works on a pivot-bolt, J.

K represents the thread passing from the upper: spool L, along and through theend of the take-up bar I at e, to the needle m,.in the lower end of the needle-bar M. Y

N is the 11ee. .lle-a1'1n.of the machine, of common form, and operated in theordinary manner.

0 is the presser-foot, also of the common kin'd.

A description of the last two is deemed unnecessary, as 1 claim no part of them as my invention.

At one end of the pivoted vibrating looper is attached a kind of needle, 3 similar in form to the one used in stitching, in the end of which is an elongated slot, through which the under thread passes as it leaves the lower spool S.

W is simply a rim on the wheel D, to start the machine wi'th. I

When the needle m is about rising, the needle or looper y, carrying the under thread, and attached to the bar E, is carried forward through the-1oop and at one side of the needle or, by the reciprocating feedoperating bar G, and when thev needle m rises above the fabric, the cam-groove a acts on the screw 0 in the arm P of the looper-arm F, and throws the looper y across the path of the needle, and so that the needlem, in its next descent, passes through the loop of the looper-thread. The take-up bar I produces the proper tension on the thread of the needle an, just 'astho' needle is raised to draw up or formthe stitch.

Having thus described my invention,

What I claim as new, and desire to secure by Let ters Patent of the United States, is'

1. The double-faced wheel on the shaft 0, provided with two cams, H a, in combination with the looper and take-up-bars F and I, substantially as and for the purpose described.

2. The reciprocating feed-operating bar G, in coinbination with the pivoted looperba r F," pin 0, and cam 11, substantially as and for the purpose described.

JOSHUA GRAY. Witnesses:

J OHN S. 'lnomvrrox, G. B. MILLER. 

